Digital I/O Control Cable with Multiple DC Voltages 2

[nightfox1925]

I have required digital input wiring from a switchgear to a VFD terminal strip rated probably <24Vdc. At the same time, I have digital outputs (dry contacts) coming from the same VFD terminal strip to the switchgear and these contacts will operate on 125Vdc powered from tge switchgear.

My question is that: Can I use one multicore cable for both digital inputs/ouputs although some will be 125Vdc and some will be <24Vdc?

I believe that this will not be an issue if I will use a 600V insulated cores and the fact that both are digital signals and are both <600V.

 

[slavag]

Im sure, you have some stndard on the issue.
From technical point of view, no problem.
From maintenence point of view, ...I like separate between few type of DC.

 

[resqcapt19]

There would be a NEC issue if the 24 volt system is an Article 725, Class 2 or 3 system.

 

[itsmoked]

If all are digital you should have no problem, especially if the distance isn't excessive.

125V DC?

Keith Cress
kcress -

http://www.flaminsystems.com

 

[davidbeach]

125V DC is an extremely common switchgear control voltage. At least that's what its called; more like 135V DC with lots of margin for voltage drop.

 

[nightfox1925]

Thank you very much for all the imputs.